<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>

      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>

      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
          数据类型一定要和取出的json中的一致，否则没法回填
          因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>

      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>

      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">
        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload"
                   @click="imagecropperShow=true">更换头像
        </el-button>
        <!--
        v-show：是否显示上传组件
        :key：类似于id，如果一个页面多个图片上传控件，可以做区分
        :url：后台上传的url地址
        @close：关闭上传组件
        @crop-upload-success：上传成功后的回调 -->
        <image-cropper
          v-show="imagecropperShow"
          :width="300"
          :height="300"
          :key="imagecropperKey"
          :url="BASE_API+'/eduOss/fileOss'"
          field="file"
          @close="close"
          @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>

<script>
import teacherApi from '@/api/edu/teacher'
// 引入图片上传组件
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  // 声明图片上传组件
  components: {ImageCropper, PanThumb},
  data() {
    return {
      teacher: {
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: ''
      },
      //上传弹框组件是否显示
      imagecropperShow: false,
      //上传组件key值
      imagecropperKey: false,
      //获取 dev.env.js里面得地址
      BASE_API: process.env.BASE_API,
      saveBtnDisabled: false // 保存按钮是否禁用,
    }
  },
  created() {
    this.init();
  },
  // 路由监听
  watch: {
    $route(to, from) {
      this.init();
    }
  },
  methods: {
    //关闭上传弹框方法
    close() {
      //关闭
      this.imagecropperShow = false;
      //上传组件初始化
      this.imagecropperKey = this.imagecropperKey + 1
    },
    //上传成功后得方法
    cropSuccess(data) {
      this.close();
      //上传成功后返回地址
      this.teacher.avatar = data.url;
    },

    init() {

      //判断路径是否有值
      if (this.$route.params && this.$route.params.id) {
        //从路径中获取id
        const id = this.$route.params.id;
        //根据id查询讲师
        this.getInfo(id);
      } else {
        // 路径中没有id值 清空表单
        this.teacher = {}
      }
    },

    //根据讲师id查询的方法
    getInfo(id) {
      teacherApi.getTeacherInfo(id)
        .then(response => {
          this.teacher = response.data.teacher
        })
    },

    saveOrUpdate() {
      this.saveBtnDisabled = true

      //判断修改还是添加
      if (!this.teacher.id) {
        this.saveData()
      } else {
        this.updateTeacher()
      }

    },
    // 修改讲师
    updateTeacher() {

      teacherApi.updateTeacher(this.teacher)
        .then(response => {
          //添加成功后回显
          this.$message({
            type: 'success',
            message: '修改成功!'
          });
          //回到列表 路由跳转
          this.$router.push({path: '/teacher/table'})
        })
    },
    // 保存
    saveData() {
      teacherApi.addTeacher(this.teacher)
        .then(response => {
          //添加成功后回显
          this.$message({
            type: 'success',
            message: '添加成功!'
          });
          //回到列表 路由跳转
          this.$router.push({path: '/teacher/table'})
        })
    }
  }
}
</script>
